“His friend said he was sitting in the cart and next thing you know it everything came tumbling down and hit him,” Villegas said.

One witness believes the pallet that fell was double-stacked on the third level of the shelving.

“There was a pallet on the ground,” one witness said. “And if you look up, there was still a pallet ... up there."

Villegas, a registered school nurse, immediately started treating the injured young boy until help arrived.

“It kind of hit him on the whole left side; he had two places where his arm was broken, from what I can tell, and a big contusion on the top his head,” Villegas said.

“You could see the bone coming out,” Villegas said. “I was just telling him it was going to be OK, he was doing good, they were taking care of him and calm down.”

Witnesses said the boy's father pulled him from the debris and EMS crews transported the boy to Southside Regional Medical Center.

There has been no word yet on his condition, but witnesses said the child was conscious and crying when he was pulled from the debris.

“I became a nurse to help. I can’t just stand there, I felt it was my duty to help,” Villegas said.

Sam's Club provided WTVR with the following statement, from Tara Raddohl, Senior Director, Corporate Communications for Sam’s Club.

“We’re incredibly saddened a young child was recently injured in one of our clubs. Our team in the club responded quickly and we’re staying in touch with the family. We are doing all we can to help as he recovers. We immediately started looking into what caused the incident. Once we fully understand what happened, if we find we need to do something differently, we’ll do it.”